//
//  CZEmoticon.swift
//  Weibo
//
//  Created by cc on 11/1/17.
//  Copyright © 2017 cc. All rights reserved.
//

import UIKit
import YYModel


/// 表情模型
class CZEmoticon: NSObject {
    
    /// 表情类型 false - 图片表情/ true - emoji
    @objc var type = false
    /// 表情字符串， 发送给新浪微博的服务器(节约流量)
    @objc var chs: String?
    /// 表情图片名称， 用于本地图文混排
    @objc var png: String?
    /// emoji 16 进制编码
    @objc var code: String?{
        didSet {
            guard let code = code else {
                return
            }
            
            let scanner = Scanner(string: code)
            
            var result: UInt32 = 0
            scanner.scanHexInt32(&result)

            emoji = String(Character(UnicodeScalar(result)!))
        }
    }
    
    
    /// 表情使用次数
    @objc var times: Int = 0
    
    /// emoji的字符串
    @objc var emoji: String?
    /// 表情模型所在的目录
    @objc var directory: String?
    
    
    /// 图片表情对应的图像
    @objc var image: UIImage? {
        
        //判断表情类型
        if type {
            return nil
        }
        
        guard let directory = directory,
            let png = png,
            let path = Bundle.main.path(forResource: "HMEmoticon.bundle", ofType: nil),
            let bundle = Bundle(path: path)
        else {
            return nil
        }
        return UIImage(named: "\(directory)/\(png)", in: bundle, compatibleWith: nil)
    }
    
    //将当前的图像转换成图片的属性文本
    func imageText(font: UIFont) -> NSAttributedString{
        
        //1.判断图像是否存在
        guard let image = image else {
            return NSAttributedString(string: "")
        }
        
        //2. 创建文本附件
        let attachment = CZEmoticonAttachment()
        //记录属性文本文字
        attachment.chs = chs
        attachment.image = image
        let height = font.lineHeight
        attachment.bounds = CGRect(x: 0, y: -4, width: height, height: height)
        
        //3.返回图片属性文本
        let attrStrM = NSMutableAttributedString(attributedString: NSAttributedString(attachment: attachment))
        
        //设置字体属性
        attrStrM.addAttributes([NSAttributedStringKey.font: font], range: NSRange(location: 0, length: 1))
        
        //4.返回属性文本
        return attrStrM
    }
    
    override var description: String {
        return yy_modelDescription()
    }
}
